HomeMy WebLinkAboutC2008-061 - 2/26/2008 - ApprovedCITY OF CORPUS CHRISTI
PACKERY CHANNEL QUARTERLY MONITORING PROJECT -
CONTRACT FOR SERVICES
The City of Corpus Christi, Texas, hereinafter called "City", and the Division of Nearshore Research
(DNR) at Texas A&M University - Gorpus Christi, hereinafter called "DNR", hereby agree as follows:
I. SERVICES TO BE 1~ERFORMED
DNR hereby agrees to perform all consulting services necessary to monitor, perform, complete, and report the
results of a comprehensive study of morphology and changes and current velocity at Packery Channel.
II. SCOPE OF SERVICES
DNR's services will be those necessary to provide the monitoring required deliver an annual written report
and presentation of the observations and results of the monitoring program that took place during the term of
this contract including the:
• collection of bathymetric data in Packery Channel and the surrounding nearshore area; and
• measurement of elevation along the adjacent beach (shoreline position).
DNR will complete the tasks set forth by Section II.A as set forth in the research proposal attached as Exhibit A.
A. TASKS
DNR will complete the following tasks:
Year 1-modified scope.
Task 1. Project Management and Interpretation of Aerial Photography
1-'I. Project Management, analysis, data archive.
Gost to City: $35,540
1-2. Aerial Photography
Description: Annual rectified aerial photographs of Packery Channel region including the entire channel from
the GIVWII to the Gulf of Mexico (GOM) and including North Padre Island and Mustang Island from the south
end of the seawall to Newport Pass. Two additional aerial photographs of the channel will be taken covering
the region from the GIVWII ko Padre Island to focus on seasonal changes in shallow tidal fla#s and Mollie
Beattie.
Purpose: For interpretation of large-scale changes in vegetation, dune line, inter-tidal regions adjacent to the
inland section of the channel as well as along Padre and Mustang Island. In addition the aerials are
appropriate for visuals and explanation aids to residents and laypersons.
Schedule: Annual (AugustlSeptember) pending weather and time of focus sets to be determined.
Cost to City: $27,361
Task 2. Measurement of Morphologic change in PC Channel and along Mustang and Padre Island.
2-1. Beach Profile surveys
Description: The beach profile survey provides information on changes occurring at 1$ specified locations
from the Nueces Kleberg County Line #o north of Fish Pass. There are historic data for these locations since
1995. Elevations measurements are collected along transects that initiate landward of the dune or other
landward limiting feature (seawall) and extend offshore up to one mile intro the GOM.
Purpose: to document changes in features such as the beach berm, sand bars and dune toe. The data are
applied to calculate volumetric change, the calculation of sand loss or gain on the beach.
Schedule: One annual survey conducted during August 2008.
Cost to City: $26,033
2-2. Shoreline Position surveys
Description: Eleva#ion data are collected by RTK GPS along the beach from close to the dune toe to the
water line. Elevations are measured by driving a vehicle along a meandering path from dune to water line.
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TX A&M Univ - CC (DNR) ~ktopIDNRContract2008_fina]DW.doc Page 1 of 5
Line spacing is an the order of 50 ft and spacing between the data points is on the order of 10 ft. The beach is
surveyed from south of the Nueces Kleberg County Line to north of Fish Pass.
Purpose: These surveys are an efficient and low-cost way to measure change in elevation across the beach
over great distances. Within a few days, a large section of the beach can be measured ko determine changes
in shoreline position from which regions of beach erosion and accretion can be determined and potential "hot
spots" can be identified.
Schedule: Seasonal surveys conducted in February, May, August and December. The February 2008 survey
is not included in khis contrack as it presently funded.
Cost to City: $15,780 (Estimated Corps contribution $4,656)
2-3. Ba#hymetric surveys
Description: These surveys combine single-beam and multi-beam sonar coverage to provide high resolution
of features more economicaEly. The channel from the GiWW to the GOM will be conducted with multi-beam
ko ensure identification of bank-to-bank features such as shoals, scour holes and sand bars. The region
immediately offshore of the mouth (area of seasonal scour and shoaling will be surveyed with mul#i-beam
while the remaining nearshore survey will combine single-beam sonar and sled technology to provide
complete coverage of the shallow nearshore bar features. The region that will be covered by the survey is
shown in Figure 1.
Purpose: to define features such as shoals {areas of deposition} and scour (areas of erasion) in the channel
and nearshore.
Schedule: Four surveys scheduled to define the peak of seasonal change. The surveys would be conducted
during the fast two weeks of the following months; February (Winter}, May {Spring), August {Summer} and
December (Fall}.
Note: The February 2008 survey is presently scheduled and sponsored as a single beam survey by the
Corps. In addition, the Corps will sponsor multi-beam bathymetric surveys that will be conducted during May
and August 2008. Therefore, the four surveys to be conducted during this contract period would begin during
December 2008 and conclude in December 2009.
Note: Current monitoring Primary Station (PC138 existing stakion)
Status: presently funded for 2008 by the Corps.
Cost to City: $60,827 (Estimated Corps contribution $59,112)
2-4. lnland Waterway and Mollie Beattie Focus Study
Description: Measure elevation along transects (survey lines) roughly perpendicular to channel orientation
starting at the location of mean higher high water {MHHW) shoreline position along the south shore and then
extending across the channel to the location of MHHW shoreline position or until a limiting feature (such as
coverage of a raised placement area) is defined. Measure the MHHW shoreline position along the south
shore of Packery Channel from the HWY 361 Bridge to the Relief Channel west of the dog leg. The location
of each transect Shawn in Figure 2 was selected to define changes that are occurring in regions were
selected based upon the following criteria; change in channel orientation, indication of shoreline or bank
erosion, previously existing transect data. In addition, transects were located such to define change in
channel boundary features such as raised placement areas and wash over channels.
Purpose: The surveys will define inland waterway channel boundary change and determine locations of scour
and shoaling. Comparison of aerial surveys and seasonal survey data will assist in understanding changes
along the channel boundary adjacent to the Mvllie Beattie Habitat Community tidal flats. Additional areas of
interest are the south shoreline along the residential community across from Mollie Beattie, Packery Channel
Park shoreline and the presently undeveloped region along the dog leg.
Schedule: Four surveys scheduled to define the peak of seasonal change. The surveys would be conducted
during following months; February (Winter), May {Spring), August {Summer) and December (Fall).
Cost to City: $51,914
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2-5. Channel Basin Revetment Surveys
Description: Changes in elevation will be measured along the north shoreline of the Packery Channel basin
to include t cps with
t=lgure z. Transact position along inland waterway of Packery Channel (approximate).
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Figure 1. Extent of bathymetric survey coverage.
the channel hydrographic data. Transects will be spaced at 10- to 40-ft intervals and the survey will exkend
from 100 ft east of the basin
along the entrance channel westward to terminate a# the intersection of the entrance road. Transects will be
measured perpendicular to channel orientation. The boat ramps will be included in the survey.
Purpose: to define changes in elevation of the north bank and revetment along the channel basin. These
data will assist in identifying potential areas of scour and shoaling. This focus survey was added to provide
insight into January 2007 revetment failure near the boat dock.
Schedule: Four surveys wil! be scheduled to define the peak of seasonal change and correspond with the
channel hydrographic surveys. The surveys would be conducted during following months; February (Winter),
May (Spring), August {Summer) and December (Fall).
Cost to City: $24,030
Total Cost: $ 241,487
Deliverables:
ASCII data sets (x,y,z} NAVD88 State Plane south Zone FIPS 4205
Online posting of current velocity for two new stations
Email status report (monkhly)
Status Reports (Bi-annually}
Cc~llaboritive Monitoring
DNR will provide data to support those research efforts currently being done by the U.S. Corps of Engineers
and the City.
t3. RESEARCH PLAN AND METHODS
The specific research plan and methods are set forth in the Research Contrack Proposal incorporated as
Exhibit A of this contract.
C. ORDER OF SERVICES
The monitoring period will be for 12 months.
III. FEES AUTHORIZED
The City will pay DNR a fxed fee not to exceed $241,487.00 for providing all services for during the contract term
(12 months}. This fee will be full and total compensation for all services provided and expenses incurred in
performing the tasks specifed in Section II. Invoices will be submitted to the Director of Engineering Services.
Invoices will be submitted no mare frequently than once per month for services rendered. All invoices shall be
accompanied by a cover letter summarizing project status and the tasks undertaken during the time period
covered by the invoice. Invoices will be based on the budget attached as Exhibit A. Invoices will be sequentially
numbered for each project, state the project name {Packery Channel Quarterly Monitoring Project} and City
project number (5228}. The letter shall state the number of the current invoice, the total authorized fee, the
amount previously invoiced, and the current amount due. Statements wil! be based upon percent of project
completed. However, a Tina! payment of $3,500 will be retained until delivery of the final report.
IV. TERMINATION OF CONTRACT
The City or DNR may, at any time, with or without cause, terminate this contract upon 30 days written notice to
DNR at the addresses specified below. If termination occurs priorto the final completion of all work contemplated
by this contract, DNR shall be paid for all reasonable costs incurred orcontractually committed to be expended as
of the effective termination date, including salaries of appointees for the remainder of their appointment. The
foregoing shall not be construed to require the City to compensate DNR for any services not performed in a
proper, professional manner.
V. NOTICE ADDRESS
Correspondence concerning this contract Shall be sent to the City and DNR as follows:
City: DNR:
Director of Engineering Services Deidre D. Williams
City of Corpus Christi Division of Nearshore Research
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P.O. Box 9277
Corpus Christi, TX 78469-9277
361-884-3500
Fax: 361-880-3501
Kevtns~ci.corpus-christ.tx.us
Texas A&M University -~ Corpus Christi
6340 Ocean Drive, Unit 5799
Corpus Christi, TX 78412
361-825-2714
Fax: 361-825-5704
williams(a~lighth~~Se.tamucc.edu
VI. OCAL PARTICI ATION
The City ouncil's stated policy is that City expenditures an contracts for professional services be of maximum
benefit t4 the local economy.
VII. ASSIGNABILITY
DNR will not assign, transfer or delegate any of its obligations or duties under this contract to any other person
without the prior written consent of the City, except for routine duties delegated to personnel of DNR. No part of
DNR's fee may be assigned in advance of receipt by DNR without written consent of the City.
The City shall not pay the fees of expert or technical assistance and consultants unless such employment,
including the rate of compensation, has been approved in writing by the City.
VIII. DISCI.OS~IRE OF INTEREST
In compliance with City of Corpus Christi Ordinance No, 17112, DNR agrees to complete the City of Corpus
Christi Disclosure of Interests farm attached as Exhibit "B".
CITY OF CORPUS CHRISTI
' g R. Escobar, P.E. Date
Interim Assistant City Manager
ATTEST:
,~~,,- ..3~...~._
City Secretary Date
APPROVED AS TO FORM:
Assis nt i Attorney Date
~~~~
TEXAS A&M UNIVERSITY -CORPUS
CHRISTI
Y~~
Associate Vice Pr sident f r Research Date
Texas A&M University -Corpus Christi
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er C~OtI!IICII. Qa ~ o g
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DIY ,
Packery Channel Quarterly Monitoring
Proposal of Work Effort and Cost Estimate
2008/2009
Revised February 7, 2008
Submitted to:
The City of Corpus Christi
Submitted by:
Deidre D. Williams
Division of Nearshore Research
The Conrad Blucher Institute for Surveying and Science
TAMUCC
Purpose:
The monitoring effort described in this proposal is a continuation of a comprehensive
study of morphology and changes and current velocity at Packery Channel that began in
2003 under sponsorship of the U.S. Army Corps of Engineers, Galveston District. The
monitoring has been led by the Division of Nearshore Research at Texas A&M
University Corpus Christi. The monitoring program includes the collection of
bathymetric data in Packery Channel and the surrounding nearshore, measurement of
elevation along the adjacent beach (shoreline position}, and measurement of water current
velocity in Packery Channel. Seasonal survey data collected since August 2006 indicate
that sediment transport in Packery Channel is seasonally driven, in large part by
fluctuations in current velocity. For example, sand shoaling is observed at the end of the
summer period with associated winds directed out of the SE and currents following the
tidal signal. Scour and channel flushing during strong periods of ebb flow, enhanced by
frontal systems pushing off the coast from the NW, is observed during the winter months
with reduced shoaling typically observed by December. Therefore seasonal monitoring is
necessary to provide timely updates to the City on changes in shoaling and scour and to
avoid mistakes in planning based on greatly varying depth change at Packery Channel.
The analysis of these data will assist in determining the location and extent of existing
regions of channel shoaling and scour as well as areas with potential for erosion and
deposition in the future. Monitoring will support proactive management of Packery
Channel as well as the surrounding nearshore and adjacent beaches along Mustang Island
and North Padre Island.
This proposal describes al! components of the existing monitoring project that is partially
funded through August 2008. The Corps may continue to fund individual tasks as
funding is identified, but the amount and timing of funding is variable and limited by
Congressional approval each year. Presently, the February 2008 bathymetric and
shoreline position surveys are funded by the Corps Galveston District and the Corps'
Coastal Inlets Research Program (CIRP) (a national program). Monitoring at the primary
i=xhibit A
Pa e 1 of 7
current station {PCI38), GIWW (JFK) and at a temporary station are funded by the
Corps. Therefore the contract year related to this proposal would initiate in May 2008
and continue through May 2009 with an option for a second year at the total project cost
{CorpsICIRP and City contributions for 2008). Funding of individual tasks would be re-
evaluated in January 2009 with recommendations presented to the City.
Year 1-modified scope with joint sponsorship during 2008 noted.
Task 1. Project Management and Interpretation of Aerial Photography
1-1. Project Management, analysis, data archive.
Cost to City: $35,540 ($9,557 Estimated Corps contribution)
1-2. Aerial Photography
Description: Annual rectified aerial photographs of Packery Channel region including
the entire channel from the GIWW to the Gulf of Mexico (GOM} and including North
Padre Island and Mustang Island from the south end of the seawall to Newport Pass.
Two additional aerial photographs of the channel will betaken covering the region from
the GIWW to Padre Island to focus on seasonal changes in shallow tidal flats and Mollie
Beattie.
Purpose: For interpretation of Iarge-scale changes in vegetation, dune line, inter-tidal
regions adjacent to the inland section of the channel as well as along Padre and Mustang
Island. In addition the aerials are appropriate for visuals and explanation aids to residents
and laypersons.
Schedule: Annual (August/September) pending weather and time of focus sets to be
determined.
Cost to City: $27,361
Task 2. Measurement of Morphologic change in PC Channel and along Mustang
and Padre Island.
2-1. Beach Profile surveys
Description: The beach profile survey provides information on changes occurring at
18 specified locations from the Nueces Kleberg County Line to north of Fish Pass. There
are historic data for these locations since I995. Elevations measurements are collected
along transects that initiate landward of the dune or other landward limiting feature
(seawall) and extend offshore up to one mile into the GOM.
Purpose: to document changes in features such as the beach berm, sand bars and dune
toe, The data are applied to calculate volumetric change, the calculation of sand loss ar
gain on the beach.
Schedule; One annual survey conducted during August 2008.
Cost to City: $26,033
2
2-2. Shoreline Position surveys
Description: Elevation data are collected by RTK GPS along the beach from close to the
dune toe to the water line. Elevations are measured by driving a vehicle along a
meandering path from dune to water line. Line spacing is on the order of 50 ft and
spacing between the data points is on the order of 10 ft. The beach is surveyed from south
of the Nueces Kleberg County Line to north of Fish Pass.
Purpose: These surveys are an efficient and low-cost way to measure change in elevation
across the beach aver great distances. Within a few days, a large section of the beach can
be measured to determine changes in shoreline position from which regions of beach
erosion and accretion can be determined and potential "hot spots" can be identified.
Schedule: Seasonal surveys conducted in February, May, August and December. The
February 2008 survey is not included in this contract as it presently funded.
Cost to City: $15,780 (Estimated Corps contribution $4,b56)
2-3. Bathymetric surveys
Description: These surveys combine.single-beam and multi-beam sonar coverage to
provide high resolution of features more economically. The channel from the GIWW to
the GOM will be conducted with multi-beam to ensure identification of bank-to-bank
features such as shoals, scour holes and sand bars. The region immediately offshore of
the mouth (area of seasonal scour and shoaling will be surveyed with multi-beam while
the remaining nearshore survey will combine single-beam sonar and sled technology to
provide complete coverage of the shallow nearshore bar features. The region that will be
covered by the survey is shown in Figure 1.
Purpose: to define features such as shoals (areas of deposition) and scour (areas of
erosion) in the channel and nearshore.
Schedule: Four surveys scheduled to define the peak of seasonal change. The surveys
would be conducted during the last twa weeks of the following months; February
(Winter), May {Spring), August (Summer) and December (Fall}.
Note: The February 2008 survey is presently scheduled and sponsored as a single beam
survey by the Corps. In addition, the Corps will sponsor multi-beam bathymetric surveys
that will be conducted during May and August 2008. Therefore, the four surveys to be
conducted during this contract period would begin during December 2008 and conclude
in December 2009.
Note: Current monitoring Primary Station (PC138 existing station}
Status: presently funded for 2008 by the Corps.
Cost to City: $60,827 (Estimated Corps contribution $59,112)
2-4. Inland Waterway and Mollie Beattie Focus Study
Description: Measure elevation along transects (survey lines} roughly perpendicular to
channel orientation starting at the location of mean higher high water (MHHVV} shoreline
position along the south shore and then extending across the channel to the location of
MHHW shoreline position or until a limiting feature {such as coverage of a raised
placement area} is defined. Measure the MHHW shoreline position along the south share
of Packery Channel from the HWY 361 Bridge to the Relief Channel west of the dog leg.
The location of each transect shown in Figure 2 was selected to define changes that are
occurring in regions were selected based upon the following criteria; change in channel
orientation, indication of shoreline or bank erosion, previously existing transect data. In
addition, transects were located such to define change in channel boundary features such
as raised placement areas and wash over channels,
Purpose: The surveys will define inland waterway channel boundary change and
determine locations of scour and shoaling. Comparison of aerial surveys and seasonal
survey data will assist in understanding changes along the channel boundary adjacent to
the Mollie Beattie Habitat Community tidal flats. Additional areas of interest are the
south shoreline along the residential community across from Mollie Beattie, Packery
Channel Park shoreline and the presently undeveloped region along the dog leg.
Schedule: Four surveys scheduled to define the peak of seasonal change. The surveys
would be conducted during following months; February {Winter), May (Spring), August
(Summer) and December (Fall).
Cost to City: $51,914
2-5. Channel Basin Revetment Surveys
Description: Changes in elevation will be measured along the north shoreline of the
Packery Channel basin to include the vegetation fine to -5 ft mean sea level or offshore
4
Figure 1. Extent of bathymetric survey coverage.
extent such that the data set overlaps with the channel hydrographic data. Transects will
be spaced at 10- to 40-ft intervals and the survey will extend from 100 ft east of the basin
along the entrance channel westward to terminate at the intersection of the entrance road.
Transects will be measured perpendicular to channel orientation. The boat ramps will be
included in the survey.
Purpose: to define changes in elevation of the north bank and revetment along the
channel basin. These data will assist in identifying potential areas of scour and shoaling.
This focus survey was added to provide insight into January 2007 revetment failure near
the boat dock.
Schedule: Four surveys will be scheduled to define the peak of seasonal change and
correspond with the channel hydrographic surveys. The surveys would be conducted
during following months; February (Winter), May (Spring), August {Summer) and
December (Fall).
Cost to City: $24,030
3-I. Current Monitoring-Primary station PC138
Description: Measurement of water current velocity at the primary station in Packery
Channel (PC138}.
Purpose: Continue measurement and online dissemination of current velocity data at the
primary station in Packery Channel.
Figure 2. Transect position along inland waterway of Packery Channel (approximate).
Schedule: Quarterly maintenance and two emergency site visits during 2008. Posting of
real-time data and online access.
Cost to City: $0 (Proposed Cost to Corps $31,261)
3-2. Temporary Current Monitoring Stations
Description: measurement of water current velocity at two temporary stations:
Station 1 will be located adjacent to the HWY 361 Bridge.
Station 2 TBD.
Purpose: To measure current velocity in the confined region of the channel at HWY 361
Bridge where the channel changes in orientation and is constrained by hard structure.
These data will assist in better understanding sediment transport and the potential for
scour and shoaling in the basin and along Mollie Beattie.
Schedule: Placement during February 2008 or September 2008. Deployment until
seasonal fluctuations are adequately documented (maximum 2 month deployment). If
seasonal fluctuations are not captured then additional funding will be required to extend
deployment.
Cost to City $ 0 {Proposed Cast to CorpsICIRP $ 35,281)
3-1. Current Monitoring-Primary station GIWW (JFKl)
Description: Measurement of water current velocity at the primary station in the Gulf
Intracoastal Waterway (JFK1)).
Purpose: Continue measurement and online dissemination of current velocity data at the
primary station in the GIWW.
Schedule: Quarterly rr~aintenance and two emergency site visits during 2008. Posting of
real time data and online access.
Cost to City: $0 (Proposed Cost to Corps/CIRP $31,261)
Total Cost to City of CC: S 241,487
Deliverables:
ASCII data sets (x,y,z} NAVD88 State Plane south Zone PIPS 4205
Online posting of current velocity for two new stations
Email status report (monthly)
Status Reports (Bi-annually)
Note: all surveys may be rescheduled based upon study findings or weather and sea
conditions.
6
City of Corpus Christi
Estimated Budget May 2008 to May 2009
Revised February 7, 2407
Personnel
Principal Investigator $ 40,737
Data AnalystlDatabase Managementlsupport staff $ 21,806
Surveying/post processing $ 74,000
Subtotal Personnel $ 136,543
Benefits $ 20,833
Total Personnel $ 157,376
Transportation-Surveys
Boat/fuel $ 4,800
Trucklfuel $ 8,337
Total Transportation $ 13,177
Rectified Aerial Photography
Contract $20,493
Total Rectified Aerial Photography $20,493
Equipment and Materials
Computer (software upgrades $ 5,000
Repair Allowance, Backup/Archive)
Survey Equipmentlmaterials $ 19,380
Total Equipment and Materials $24,380
Indirect $26,061
Project Total $241,487
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